我正在关注本教程，请在此处输入链接描述。问题是它mapView.setBuiltInZoomControls(true)根本不起作用......但是当我使用它时mapView.setClickable(true)它就起作用了。但是然后我的onTouch..方法不会启动。这是完整的代码。
package com.emazdoor.gpsmap;
import java.util.List;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Point;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.widget.Toast;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
public class GPSMap_Activity extends MapActivity {
private LocationManager locationManager;
public MyLocationListener locationListener;
private MapView mapView;
private MapController mapcontroller;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gpsmap_);
mapView = (MapView) findViewById(R.id.mapview);
mapcontroller = mapView.getController();
mapView.setBuiltInZoomControls(true);
// mapView.setClickable(true);
String coordinates[] = { "30", "71" };
double latitude = Double.parseDouble(coordinates[0]);
double longitude = Double.parseDouble(coordinates[1]);
GeoPoint p = new GeoPoint((int) (latitude * 1E6),
(int) (longitude * 1E6));
mapcontroller.animateTo(p);
mapcontroller.setZoom(7);
mapView.invalidate();
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationListener = new MyLocationListener();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,
0, locationListener);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.my_location:
Toast.makeText(GPSMap_Activity.this, "Moving to current Location",
Toast.LENGTH_LONG).show();
locationListener.gpsCurrentLocation();
return true;
case R.id.mapview_setellite:
Toast.makeText(GPSMap_Activity.this, "Satellite View",
Toast.LENGTH_LONG).show();
if (mapView.isSatellite() == false)
mapView.setSatellite(true);
return true;
case R.id.mapview_normal:
Toast.makeText(GPSMap_Activity.this, "Normal View",
Toast.LENGTH_LONG).show();
if (mapView.isSatellite() == true)
mapView.setSatellite(false);
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == 1) {
GeoPoint p = mapView.getProjection().fromPixels((int) event.getX(),
(int) event.getY());
Toast.makeText(GPSMap_Activity.this,
p.getLatitudeE6() / 1E6 + " " + p.getLongitudeE6() / 1E6,
Toast.LENGTH_LONG).show();
}
return true;
}
public class MyLocationListener implements LocationListener {
private double tempLatitude, tempLongitude;
public void onLocationChanged(Location location) {
location.getLatitude();
location.getLatitude();
String text = "My current Location is:" + " Latitude= "
+ location.getLatitude() + " Longitude= "
+ location.getLongitude();
Toast.makeText(GPSMap_Activity.this, text, Toast.LENGTH_LONG)
.show();
if (location.getLatitude() == 71) {
AlertDialog.Builder alertBox = new AlertDialog.Builder(
GPSMap_Activity.this);
alertBox.setMessage("You have Entered in wrong place");
alertBox.setNeutralButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
}
});
alertBox.show();
}
tempLatitude = location.getLatitude();
tempLongitude = location.getLongitude();
this.gpsCurrentLocation();
}
public void gpsCurrentLocation() {
String coordinates[] = { "" + tempLatitude, "" + tempLongitude };
double latitude = Double.parseDouble(coordinates[0]);
double longitude = Double.parseDouble(coordinates[1]);
GeoPoint p = new GeoPoint((int) (latitude * 1E6),
(int) (longitude * 1E6));
mapcontroller.animateTo(p);
mapcontroller.setZoom(7);
MyMapOverlay marker = new MyMapOverlay(p);
List<Overlay> listofover = mapView.getOverlays();
listofover.clear();
listofover.add(marker);
mapView.invalidate();
}
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
}
public class MyMapOverlay extends Overlay {
GeoPoint locationGeo = null;
public MyMapOverlay(GeoPoint location) {
this.locationGeo = location;
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
super.draw(canvas, mapView, shadow);
Point screenPoint = new Point();
mapView.getProjection().toPixels(this.locationGeo, screenPoint);
canvas.drawBitmap(BitmapFactory.decodeResource(getResources(),
R.drawable.ic_delete), screenPoint.x, screenPoint.y, null);
}
}
}